Before launching a promotion, it's important to make sure that the promotion shows and works correctly. To do so, all promotions includes the tool "Test Mode" which allows the administrator to carry out real tests of the promotion. This means that they can participate in the promotion just like the participants will do once the promotion is activated, and test that the promotion works as expected. That way, they can make changes to the promotion if necessary before launching.
After testing and diabling the Test Mode, the system will automatically delete all the test data and reset the promotion so it's ready for launch.